CN2414262Y - Special gate valve - Google Patents
Special gate valve Download PDFInfo
- Publication number
- CN2414262Y CN2414262Y CN 00205670 CN00205670U CN2414262Y CN 2414262 Y CN2414262 Y CN 2414262Y CN 00205670 CN00205670 CN 00205670 CN 00205670 U CN00205670 U CN 00205670U CN 2414262 Y CN2414262 Y CN 2414262Y
- Authority
- CN
- China
- Prior art keywords
- plunger
- valve
- plunger piston
- gate valve
- seal ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a special gate valve, which is provided with a valve body, a valve cover, a valve rod, a plunger piston, and sealing rings, wherein, the plunger piston is fixedly connected with the lower end of the valve rod; the outer surface of the plunger piston is tightly contacted with an upper sealing ring and a lower sealing ring so as to generate radial direction seal; the plunger piston is a high precision stainless steel plunger piston or a high precision metal plunger piston suitable for gate valves; the sealing rings are carbon filament sealing rings or graphite sealing rings or other high wearproof nonmetal sealing rings. The utility model adopts metal and nonmetal tightly contacted radial direction seal, and has the advantages of good sealing effect, small wearing, long service life, no damage to the plunger piston by extraneous constituents in the medium, and convenient maintenance.
Description
The utility model relates to a kind of gate valve, especially a kind of special formula gate valve with apex combustion seal.
Existing common gate valve is to use the handwheel rotation valve rod, drives metal flashboard end flat and metal valve body inner sealing surface and closely contacts and seal.Because the sealing of existing gate valve is the very stiff and demanding plane sealing of metal and Metal Contact, thereby wearing and tearing are big, easily produces and leaks.And the surface of contact of flashboard and valve body then can influence its sealing effect, reduction of service life as getting involved impurity.If in use leak, when needing repairing gate valve, must stop to produce, gate valve is separated pipeline, after electric welding and grinding, re-assembly and could continue to use, thereby make inconvenient maintenance.
The purpose of this utility model is: a kind of special formula gate valve is provided, makes its good sealing effect, it is little to wear and tear, and the life-span is long; And make the impurity in the medium can not damage the moving parts that plays closing function in the valve body, and make it easy to maintenance.
The technological scheme that realizes the utility model purpose is as follows: in a kind of special formula gate valve of being made up of valve body, valve gap and valve rod, have plunger and seal ring, plunger places the below of valve rod, and fixedlys connected with valve rod.The internal surface of seal ring contacts with the intimate of plunger, between do not have the gap, produce radial seal.Seal ring has two, and promptly upper sealing ring and lower sealing ring are equipped with a hole frame between upper and lower seal ring.Plunger in the utility model structure is a highi degree of accuracy stainless steel plunger, also can be other and is suitable for the high-precision metal plunger that gate valve is used.Seal ring is the carbon fiber seal ring or the graphite-seal ring of high abrasion, also can be the nonmetal seal ring of other high abrasions.
Owing to adopt technique scheme, make to the utlity model has following advantage and positive effect:
1, the special formula gate valve of the utility model adopts radial seal, the fixedly connected metal plunger in the lower end of valve rod, and the outer surface of plunger closely contacts the generation radial seal with two nonmetal seal rings one on the other.When gate valve was closed, stainless steel plunger lower end promptly closely contacted firmly with nonmetal lower sealing ring one soft, made it the sealing effect that keeps good, prevented interior leakage; When opening gate valve, the plunger lower end rises to upper sealing ring, and same plunger and upper sealing ring also are one soft one hard closely contact seal.Compare with the very stiff and demanding plane sealing of Metal Contact with the metal that existing gate valve adopts, the utility model metal and nonmetal contact soft to hard radial seal, it is big, soft to hard good sealing effect to have between plunger and the seal ring area of contact.Sealing between the nonmetal seal ring of high-precision stainless steel plunger and high abrasion, it is little to make it to wear and tear, and the life-span is long.The number of times of the upper and lower direction switch gate valve of stainless steel plunger can reach 1～1.5 ten thousand time, than existing common gate valve life-span prolongation.
2, the impurity in the media can not damage the moving parts plunger that plays closing function in the special formula gate valve, and when valve closing, plunger just enters in the lower sealing ring, and particulate and other impurity that can will be stored in automatically in the medium are directly cleared away; When opening valve, plunger is got back in the upper sealing ring, and plunger seal face and medium break away from, and therefore can keep excellent sealing performance.
If 3, the special formula gate valve of the utility model in use leaks, no matter be interior leakage or leak outside, after all only need be closed gate valve, evenly tighten the nut on the valve gap, just can be transferred to sealing state to valve again, make it easy to maintenance.These characteristics of the present utility model be existing common gate valve can't realize.
Below in conjunction with drawings and Examples the utility model is further specified
Fig. 1 is the structure cross-sectional schematic of the special formula gate valve of the utility model
Among the figure, 1. seal ring 8. lower seal 9. valve bodies on the handwheel 2. valve gaps 3. valve rods 4. bolts 5. plungers 6. hole framves 7.
Figure 1 shows that an embodiment of the special formula gate valve of the utility model, this spy's formula gate valve has a valve body 9, a valve gap 2 and a valve rod 3, is connected by bolt 4 between valve gap 2 and the valve body 9.The top of valve rod 3 is equipped with a handwheel 1, is threaded between the center hole of valve rod 3 and valve gap 2.There is a plunger 5 below of valve rod 3, and plunger 5 is fixedlyed connected with the lower end of valve rod 3, is that bottom with valve rod 3 is embedded on the plunger 5 in the corresponding groove of Transverse plane in the present embodiment.Can drive the Push And Release that plunger 5 oscilaltions realize gate valve with handwheel 1 rotation valve rod 3.Plunger 5 is a metal plunger, and plunger 5 is a highi degree of accuracy stainless steel plunger in the present embodiment.Upper sealing ring 7 and lower sealing ring 8 are housed in the center hole of valve body 9, are equipped with a hole frame 6 between the upper and lower seal ring.The internal surface of upper and lower seal ring contacts with the intimate of plunger 5.Upper and lower seal ring is the nonmetal seal ring of high abrasion, and two seal rings are the carbon fiber seal ring in the present embodiment, also can be graphite-seal ring.
The special formula gate valve structure of the utility model is reasonable, easy to maintenance, when the nut on the valve gap can not tighten up, as long as the seal ring that more renews does not need special instrument, can keep good performance through simple maintenance again, and can continue to use.These characteristics of the present utility model are that existing common gate valve is not available.
Claims (4)
1, a kind of special formula gate valve, comprise valve body (9), valve gap (2) and valve rod (3), it is characterized in that: also comprise plunger (5) and seal ring, plunger (5) places the below of valve rod (3), and fixedly connected with valve rod (3), the internal surface of seal ring contacts with the intimate of plunger (5), produces radial seal.
2, special formula gate valve according to claim 1 is characterized in that; Described plunger (5) is the stainless steel plunger, and described seal ring is the carbon fiber seal ring.
3, special formula gate valve according to claim 1, it is characterized in that: described plunger (5) is the stainless steel plunger, and described seal ring is a graphite-seal ring.
4, special formula gate valve according to claim 1 is characterized in that: have upper and lower two seal rings, between upper sealing ring (7) and lower sealing ring (8) a hole frame (6) is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205670 CN2414262Y (en) | 2000-03-07 | 2000-03-07 | Special gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205670 CN2414262Y (en) | 2000-03-07 | 2000-03-07 | Special gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2414262Y true CN2414262Y (en) | 2001-01-10 |
Family
ID=33573800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00205670 Expired - Fee Related CN2414262Y (en) | 2000-03-07 | 2000-03-07 | Special gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2414262Y (en) |
-
2000
- 2000-03-07 CN CN 00205670 patent/CN2414262Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |